@media only screen and (max-width: 1600px) and (min-width: 1280px) {
    html {
        font-size: 14px;
    }
}

@media only screen and (max-width: 1280px) and (min-width: 960px) {
    html {
        font-size: 12px;
    }
}

@media only screen and (max-width: 960px) {
    html {
        font-size: 10px;
    }
}